Rails installation and setup - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the first step to install Ruby on Rails?

Install Ruby on your computer first because Rails is a Ruby framework. You can download Ruby from the official website or use a version manager like rbenv or RVM.

beginner

How do you install Rails after Ruby is installed?

Use the command gem install rails in your terminal. This downloads and installs the Rails framework on your system.

beginner

What command creates a new Rails project?

Use rails new project_name. This sets up a new folder with all the files and folders Rails needs to start your app.

intermediate

Why do you run bundle install after creating a new Rails app?

It installs all the Ruby gems (libraries) your app needs, as listed in the Gemfile. This makes sure your app has all the tools it requires.

beginner

How do you start the Rails server to see your app in a browser?

Run rails server or rails s in your project folder. Then open http://localhost:3000 in your browser to see your app running.

Which command installs the Rails framework?

A gem install rails

B rails new

C bundle install

D ruby install rails

The command gem install rails installs the Rails framework after Ruby is installed.

What does rails new myapp do?

A Starts the Rails server

B Updates Rails to the latest version

C Creates a new Rails project named myapp

D Installs Ruby

The command rails new myapp creates a new Rails project folder called myapp with all necessary files.

Why is Ruby needed before installing Rails?

A Rails is a Ruby framework and needs Ruby to run

B Ruby installs Rails automatically

C Ruby is a database

D Ruby is a web server

Rails is built with Ruby, so Ruby must be installed first for Rails to work.

What is the purpose of bundle install?

A To start the Rails server

B To install all gems listed in the Gemfile

C To create a new Rails app

D To uninstall Rails

bundle install installs all the Ruby libraries your app needs as specified in the Gemfile.

After running rails server, where do you go to see your app?

A http://127.0.0.1:5000

B http://railsapp.com

C http://localhost:8080

D http://localhost:3000

The Rails server runs on port 3000 by default, so you visit http://localhost:3000 to see your app.

Explain the steps to install and set up a new Rails application from scratch.

Think about what you need before Rails, how to get Rails, and how to start your app.

Describe what happens when you run the command 'rails new project_name'.

Imagine setting up a new workspace for your app.